Abstract
Most of the lateral dislocations reported in previous literatures occurred to healthy patients by accident. However, our patient had limping gait, flexion contracture of the elbow, and spasticity in an affected arm due to a traumatic brain lesion 20 years ago. He fell down while taking a walk and presented with a lateral elbow dislocation accompanying tingling sense in ulnar nerve territory of his hand. Open reduction was performed. The torn MCL was reattached and the ulnar nerve was released. In postoperative six months, the range of motion was regained and the neurologic symptoms were resolved. This case shows that flexion contracture of elbow joint and a brain lesion causing motor disturbance of upper extremity could be the specific condition causing lateral elbow dislocation. Open reduction including repair of MCL and decompression of ulnar nerve, seems quite reasonable for the treatment of the lateral elbow dislocation.
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